EVERYDAY SCIENCE

Detailed explanation-1: -Prokaryotes are simple organisms that lack membrane-bound organelles. All prokaryotes are unicellular. They consist of only one cell. Example: bacteria. They possess a ‘nucleoid’ instead of a true nucleus.

Detailed explanation-2: -Unicellular organisms can be prokaryotes or eukaryotes. Prokaryotes do not have cell nuclei: their structures are simple. Bacteria and archaea are all unicellular prokaryotes.

Detailed explanation-3: -Unicellular prokaryotic species only exist in Monera. Unicellular prokaryotic species, such as bacteria, are classified as “Monera” since they lack a nuclear membrane and are capable of both autotrophic (chemosynthetic and photosynthetic) and heterotrophic (saprophytic/parasitic) feeding.

Detailed explanation-4: -Unicellular organisms include bacteria, protists, and yeast. For example, a paramecium is a slipper-shaped, unicellular organism found in pond water.

Detailed explanation-5: -Bacteria lack a membrane-bound nucleus and other internal structures and are therefore ranked among the unicellular life-forms called prokaryotes.